全文获取类型
收费全文 | 744篇 |
免费 | 40篇 |
出版年
2023年 | 7篇 |
2022年 | 9篇 |
2021年 | 13篇 |
2020年 | 11篇 |
2019年 | 28篇 |
2018年 | 28篇 |
2017年 | 31篇 |
2016年 | 29篇 |
2015年 | 15篇 |
2014年 | 27篇 |
2013年 | 101篇 |
2012年 | 48篇 |
2011年 | 62篇 |
2010年 | 39篇 |
2009年 | 17篇 |
2008年 | 36篇 |
2007年 | 47篇 |
2006年 | 40篇 |
2005年 | 26篇 |
2004年 | 18篇 |
2003年 | 29篇 |
2002年 | 22篇 |
2001年 | 8篇 |
2000年 | 7篇 |
1999年 | 10篇 |
1998年 | 9篇 |
1997年 | 5篇 |
1996年 | 6篇 |
1995年 | 3篇 |
1994年 | 5篇 |
1993年 | 4篇 |
1992年 | 2篇 |
1990年 | 2篇 |
1989年 | 4篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1985年 | 3篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1982年 | 4篇 |
1981年 | 5篇 |
1979年 | 2篇 |
1978年 | 3篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1974年 | 2篇 |
1972年 | 1篇 |
1970年 | 3篇 |
1968年 | 1篇 |
排序方式: 共有784条查询结果,搜索用时 15 毫秒
51.
Castillo R Ruiz JR Chillón P Jiménez-Pavón D Esperanza-Díaz L Moreno LA Ortega FB 《Psicothema》2011,23(3):349-355
We examined the associations between parental educational/occupational levels and cognitive performance in Spanish adolescents. Cognitive performance was measured by a validated Scholar Aptitudes test in 2,162 participants. Parental educational and occupational levels were positively associated with all specific cognitive abilities and the overall score (p<001 to .04). The odds ratios of having a high cognitive performance (top quartile) in adolescents with high parental educational level were 1.6 to 1.7 times higher than for those with a low parental educational level. Similarly, the odds ratios were 1.9 to 2.4 times higher for adolescents with high parental occupational level. These findings suggest an association between parental educational/occupational levels and cognitive performance in Spanish adolescents and support the parents' role in the creation of a stimulating intellectual environment. 相似文献
52.
Calderón-Garcidueñas L Engle R Mora-Tiscareño A Styner M Gómez-Garza G Zhu H Jewells V Torres-Jardón R Romero L Monroy-Acosta ME Bryant C González-González LO Medina-Cortina H D'Angiulli A 《Brain and cognition》2011,77(3):345-355
Exposure to severe air pollution produces neuroinflammation and structural brain alterations in children. We tested whether patterns of brain growth, cognitive deficits and white matter hyperintensities (WMH) are associated with exposures to severe air pollution. Baseline and 1 year follow-up measurements of global and regional brain MRI volumes, cognitive abilities (Wechsler Intelligence Scale for Children-Revised, WISC-R), and serum inflammatory mediators were collected in 20 Mexico City (MC) children (10 with white matter hyperintensities, WMH+, and 10 without, WMH−) and 10 matched controls (CTL) from a low polluted city. There were significant differences in white matter volumes between CTL and MC children - both WMH+ and WMH− - in right parietal and bilateral temporal areas. Both WMH− and WMH+ MC children showed progressive deficits, compared to CTL children, on the WISC-R Vocabulary and Digit Span subtests. The cognitive deficits in highly exposed children match the localization of the volumetric differences detected over the 1 year follow-up, since the deficits observed are consistent with impairment of parietal and temporal lobe functions. Regardless of the presence of prefrontal WMH, Mexico City children performed more poorly across a variety of cognitive tests, compared to CTL children, thus WMH+ is likely only partially identifying underlying white matter pathology. Together these findings reveal that exposure to air pollution may perturb the trajectory of cerebral development and result in cognitive deficits during childhood. 相似文献
53.
Francisco Félix Caballero Marta Miret Beatriz Olaya Jaime Perales Ruy López-Ridaura Josep Maria Haro Somnath Chatterji José Luis Ayuso-Mateos 《Journal of Happiness Studies》2014,15(4):915-935
The aims of the present study were to assess the psychometric properties of the Spanish-language version of the abbreviated Day Reconstruction Method (DRM), and to investigate differences in affective experience in Mexico and Spain. A total of 2,629 adults from Mexico and 4,583 from Spain were interviewed. Information was obtained using an abbreviated version of the DRM, which had been translated into Spanish. Reliability, validity, and the structure of affect were assessed and compared between countries. The diurnal variation of affect, the changes in affect along the life span, time use, and the relationship between affect and socio-demographic characteristics were also analysed. Adequate psychometric properties for the Spanish-language version of the abbreviated DRM were found in both the Mexican and the Spanish samples, and affect tended to improve along the life span in both countries. However, net affect did not have the same distribution function (Kolmogorov–Smirnov statistic = 0.25, p < 0.001) in both countries, being higher in Spain. Moreover, both samples showed opposite patterns in the diurnal variation of affect. The results showed that the Spanish-language version of the DRM is a feasible and valid method to measure affect, its diurnal rhythms, and time use in large-scale surveys. 相似文献
54.
Motivation and Emotion - According to the awe-quixoteism hypothesis, one experience of awe may lead to the engagement in challenging actions aimed at increasing the welfare of the world. However,... 相似文献
55.
Víctor E. Olivares‐Faúndez Pedro R. Gil‐Monte Hugo Figueiredo‐Ferraz 《The Japanese psychological research》2014,56(4):340-348
Earlier studies have shown that feelings of guilt appear to be involved in the burnout process. However, the exact nature of the relationship between burnout, feelings of guilt, and tobacco and alcohol use is unclear. The purpose of this study was to analyze the role of feelings of guilt in the relationship between burnout and the consumption of tobacco and alcohol. Role conflict, Role clarity, and Feedback were included as predictors of burnout. The sample of this cross‐sectional study consisted of 260 Chilean administration and customer service workers. Hypotheses were tested using a path model. The hypothesized model (i.e., Indolence to guilt to tobacco/alcohol use) showed an adequate data fit, including a mediator role of feelings of guilt in the relationship between burnout and alcohol use. The results of this study recommending taking into consideration the evaluation of feelings of guilt as a symptom of burnout in order to develop a more reliable diagnosis of burnout syndrome and its consequences. 相似文献
56.
Luis Rosa 《Philosophia》2014,42(2):503-515
In this paper, we offer an alternative interpretation for the claim that ‘S is justified in believing that φ’. First, we present what seems to be a common way of interpreting this claim: as an attribution of propositional justification. According to this interpretation, being justified is just a matter of having confirming evidence. We present a type of case that does not fit well with the standard concept, where considerations about cognition are made relevant. The concept of cognitive algorithm is presented and explained. Finally, the new reading of ‘S is justified in believing that φ’ is fleshed out. According to this interpretation, being justified in believing that φ is not just a matter of having evidence in favor of φ, but also of having a cognitive algorithm available such that it allows one to form belief in φ on the basis of the relevant evidence. 相似文献
57.
Claudio Calosi 《Synthese》2014,191(5):915-928
The paper address the question of whether quantum mechanics (QM) favors Priority Monism, the view according to which the Universe is the only fundamental object. It develops formal frameworks to frame rigorously the question of fundamental mereology and its answers, namely (Priority) Pluralism and Monism. It then reconstructs the quantum mechanical argument in favor of the latter and provides a detailed and thorough criticism of it that sheds furthermore new light on the relation between parthood, composition and fundamentality in QM. 相似文献
58.
Homeownership represents an important indicator of immigrant incorporation and assimilation. This study is a longitudinal analysis of the transition to first-time homeownership among a cohort of youths followed from 1979 to 2009 using the National Longitudinal Survey of Youth (NLSY, 1979). In particular, I examine Mexican generational group differences in the transition to first-time homeownership over an observation period that spans 30 years while evaluating theories of straight-line and segmented assimilation. I find that Mexican homeownership rates do not increase in a linear fashion across generations, relative to native, non-Hispanic whites, even after controlling for various social, demographic, and economic characteristics. Furthermore, analyses limited to Mexicans reveal that first- and second-generation respondents exhibit more success in the transition to first-time homeownership than their third-generation counterparts. Contrary to observing linear gains in homeownership across generations, I find that Mexicans are experiencing segmented paths towards homeownership and achieving upward mobility across generations. 相似文献
59.
60.
Claudio E. A. Pizzi 《Studia Logica》2018,106(3):453-480
The first section of the paper establishes the minimal properties of so-called consequential implication and shows that they are satisfied by at least two different operators of decreasing strength (symbolized by \(\rightarrow \) and \(\Rightarrow \)). Only the former has been analyzed in recent literature, so the paper focuses essentially on the latter. Both operators may be axiomatized in systems which are shown to be translatable into standard systems of normal modal logic. The central result of the paper is that the minimal consequential system for \(\Rightarrow \), CI\(\Rightarrow \), is definitionally equivalent to the deontic system KD and is intertranslatable with the minimal consequential system for \(\rightarrow \), CI. The main drawback ot the weaker operator \(\Rightarrow \) is that it lacks unrestricted contraposition, but the final section of the paper argues that \(\Rightarrow \) has some properties which make it a valuable alternative to \(\rightarrow \), turning out especially plausible as a basis for the definition of operators representing synthetic (i.e. context-dependent) conditionals. 相似文献